Years ago, in college, I moved into an apartment that I swear to this day had a presence in it. I had never felt anything like it before, but I constantly felt like something was with me, was watching me, right behind me, etc. It wasn't evil, exactly, but it was very disconcerting, and the longer it went on, the less safe I felt in my home. I didn't know how I felt about ghosts, and I thought it could all be in my mind, but then why had it never happened anywhere else I had lived? This was not my first time living alone. I told my boyfriend, but he didn't really believe me. My mother did, but didn't know what to do about it. She told me stories about her mother, who had seen ghosts several times in her life, and about her grandmother, who believed her own home to be haunted.
One day, in one of my classes, I was talking to a girl I hardly knew who sat next to me, and she brought up ghosts. She said something to me that made me think she might believe me, and for some reason, I ended up pouring out the whole story to her. She listened like she believed me, even though afterward I felt silly. Then she said, "Have you ever tried just asking it to leave?" I was shocked. No, I had never spoken to "it." I wasn't even sure what "it" was, for goodness sake! She went on to say that, if this wasn't an evil presence, it might not even realize how it was making me feel. It was certainly worth a shot.
Well, I thought about it. And one night, when I was home alone, I felt it again. Something was there. Something was watching me. So I stood in the center of the apartment, very still, and said loudly, "I'm sure you don't mean to, but you're scaring me. Please just leave me alone." And I swear to you, I felt something like a whoosh and I started shaking...and it was gone. Completely. I lived in that apartment for 2 more years and never felt it again. And I have never had another paranormal experience at all, since then, either. Even when, several years later, I had a crisis in faith and was looking for some sign of the supernatural, nothing.
Ever since then, I have believed in ghosts, or spirits, or something. And I'm grateful to that girl, who never sat next to me again, but who gave me the advice that allowed me to live in my home in peace. So give it a try. You have nothing to lose. If it doesn't work, you can always call the church and have your home blessed or exorcised. Good luck.